Yes the TF may have been larger, but lets be honest with ourselves - a lot of the escorts in it were very old, and almost totally obsolete. They had guns, seacat and wasp and err, thats it (a few may have had exocet too). Only 2 seawolf and 5 seadart equipped vessels present, and only 3 / 8 in the whole RN in total.
Fast forward now and every frigate has seawolf, and we've still got 5 dart equipped vessels. The Merlin / Lynx combo also works well too. In absolute extremis then we could probably test fire Sea Viper on an Argentine aircraft if we needed to. We've got better kit, better radars, better missiles and more importantly, its designed incorporating the painful lessons learned last time.
The Argentines have the same kit, the same radars and the same missiles and havent been able to maintain it properly for a very long time.